In article ,
Tim Wescott wrote:

How do you drill clean holes in linen-filled phenolic?

I'll admit that I haven't tried it yet, but I'm thinking that if I use a
regular twist drill it'll be chip city.

It's 1/8" thick flat material, I'm planning on some 3/32" holes and some
1/4" holes.

It's been a few decades, but it actually machines quite well. As the
inexpensive, non-magnetic, reasonably strong insulating material of
choice I used a LOT of in in various plasma-physics related work. Sharp
tools - and carbide is a good idea, as it makes most softer tools dull
quickly (but they will be fine if you're only doing a few holes and they
are sharp to begin with.)

1/8" is a bit on the thin side.

If you do have problems with drills, try end-cutting endmills, solid
carbide, - if you don't have a mill, in a plunge router clamped to the
work (get 1/4" shank endmills so you can find a router collet to fit.)

--
Cats, coffee, chocolate...vices to live by
Please don't feed the trolls. Killfile and ignore them so they will go away.